Accession Number : AD0505552

Title :   In-Space Friction Tests.

Descriptive Note : Final rept. Apr 65-Sep 69,

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CALIF

Personal Author(s) : Hammel,Robert L.

Report Date : NOV 1969

Pagination or Media Count : 115

Abstract : An investigation of boundary layer sliding friction of materials is presented. The program included the development of a satellite system and experiments to perform direct in-space measurements of sliding friction between sixteen material combinations. A fourteen month orbital test phase was accomplished. Using identical experiment hardware, ground test vacuum studies of sliding friction were also performed. These included both prelaunch tests, and post launch studies in which there were deliberate modifications of the laboratory vacuum environment. The information obtained in this program provides a basis for establishing the adequacy of simulation test criteria pertinent to both materials as well as component friction testing. (Author)

Descriptors :   (*SPACECRAFT COMPONENTS, *FRICTION), (*SATELLITES(ARTIFICIAL), SPACE ENVIRONMENTS), SIMULATION, METALS, ALLOYS, INORGANIC COMPOUNDS, POLYMERS, LUBRICANTS, FILMS, ADHESION, VACUUM, RARE GASES (U) SCIENTIFIC SATELLITES, ELLIPTICAL ORBIT TRAJECTORIES, SPACE SIMULATION CHAMBERS, VACUUM, ORBITS, LAUNCHING, SPACECRAFT COMPONENTS, WATER VAPOR, OXYGEN, CONTROLLED ATMOSPHERES

Subject Categories : Miscellaneous Materials
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE